Method and device for finishing the surface layers of the machine reel that is formed during reeling of the web

ABSTRACT

A method and a device for finishing the surface layers of the machine reel (13) that is formed during reeling of the web (P). In the method; a member (20) that presses the web is brought onto the face of the reel (12) that is being completed before the reel (12) that is being completed is transferred to the reel change position. The full reel (12) is transferred to the reel change position so that the member (20) that presses the web during nip-free reeling forms a contact with the web, which contact prevents access of air between the web layers, and follows the full reel (12) during its transfer to the reel change position. During the reeling of the surface layer to be finished, the member (20) that presses the web is shifted apart from the face of the reel (12) that is being completed along such a path (D) of movement that the member (20) that presses the web maintains a contact of the desired extent with the face of the reel (12) that is being completed.

BACKGROUND OF THE INVENTION

The invention concerns a method for finishing the surface layers of themachine reel that is formed during reeling of the web.

The invention also concerns a device for finishing the surface layers ofthe machine reel that is formed during reeling of the web.

When a full machine reel is separated from the face of the reeling drum,there is no nip contact any longer. Then, air readily penetrates intothe machine reel through the gap between the full machine reel and thearriving web, which produces deterioration of the quality of the machinereel. Since air has access between the layers, the layers become slack.Such a drawback of waste layers is relatively extensive and equals up toabout 500 metres of web that is reeled. When a full machine reel isstopped, the slack surface layers can move to either side.

At present, attempts are made to prevent the drawbacks described aboveso that, in connection with change of reel, reeling without a nip is notemployed. At present, the properties of the web permit utilization ofthe web tension. However, the risk of web break in connection with reelchange is increased considerably, so that this technique is not optimaleither.

SUMMARY

The object of the invention is to provide a method and a device by whosemeans the drawbacks present in the prior-art solutions are avoided.

The method in accordance with the invention is characterized in that, inthe method,

(a) a member that presses the web is brought onto the face of the reelthat is being completed before the reel that is being completed istransferred to the reel change position,

(b) the full reel is transferred to the reel change position so that themember that presses the web during nip-free reeling forms a contact withthe web, which contact prevents access of air between the web layers,and follows the full reel during its transfer to the reel changeposition, and

(c) during the reeling of the surface layers to be finished, the memberthat presses the web is shifted apart from the face of the reel that isbeing completed along such a path of movement that the member thatpresses the web maintains a contact of the desired extent with the faceof the reel that is being completed.

On the other hand, the device in accordance with the invention ischaracterized in that the device comprises a member that presses the weband that is brought onto the face of the reel that is being completedbefore the reel that is completed is transferred to the reel changeposition, that the member that presses the web is fitted to form acontact with the web, which contact prevents access of air between theweb layers, when the full reel is transferred to the reel changeposition, that said member that presses the web is fitted to follow thefull reel during its transfer to the reel change position, and that themember that presses the web is provided with actuators which are fittedto shift the member that presses the web during the reeling of thefinishing surface layers apart from the face of the reel that is beingcompleted along such a path of movement that the member that presses theweb is fitted to maintain a contact of the desired extent with the faceof the reel that is being completed.

In the solution in accordance with the invention, in the final stage ofthe reeling, nip-free reeling and a member that presses the web areemployed. The member that presses the web prevents access of air betweenthe web layers. Then, the result is a highly carefully finished face ofthe machine reel. As the member that presses the web, it is preferableto use a brush device. Also, a fragmentary roll and a spreader bar aresome further preferred alternative embodiments of the member thatpresses the web. Owing to the solution in accordance with the presentinvention, in practice, no waste of web is produced, because of whichthe solution in accordance with the invention is also economically asignificant improvement over prior-art solutions.

The invention will be described in detail with reference to a preferredembodiment of the invention shown in the figures in the accompanyingdrawing, to which embodiment alone the invention is, however, notsupposed to be confined.

BRIEF DESCRIPTION OF THE DRAWING

FIG. 1 is a side view of a preferred embodiment of the method and thedevice in accordance with the invention.

FIG. 2 is a schematic side view of the reeling stage in which the devicein accordance with the invention is brought onto the face of the reelthat is being completed before the reel that is being completed isshifted to the reel change position.

FIG. 3 shows the reeling stage in which the device in accordance withthe invention starts finishing the surface layers of the machine reelthat is formed in the reeling of the web.

FIG. 4 is a schematic side view of the reeling stage in which thecomplete machine reel is being shifted to the change position.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

In FIG. 1, the reeling system is denoted generally with the referencenumeral 10. In this embodiment, the reeling system 10 comprises areeling drum 11, which revolves in the direction indicated by the arrowA, and the web P is reeled onto the second roll, i.e. the reel spool 12.The web P is reeled onto the reel spool 12 by the intermediate of thereeling drum 11 through the nip N. The reel drum 12 revolves in thedirection indicated by the arrow B. The reel spool 12 is mounted onreeling rails 14, and the reel spool 12 is provided with a centre drive16 and with a reelspool shifting device 17. The reference numeral 13represents the machine reel that is being formed, and the referencenumeral 15 denotes the reeling carriage, with which the reel-spoolshifting device 17 is connected operationally. Further, the reelingsystem 10 comprises devices for initial reeling 18. The referencenumeral 12a denotes an empty reel spool, which revolves in the directionindicated by the arrow C. Such a reeling arrangement is conventional anddoes not represent any part of the invention proper.

According to the basic realization of the invention, the member 20 thatpresses the web is brought onto the face of the reel spool 12 that isbeing filled, i.e. onto the face of the machine reel 13, before the reel12 that is being completed is shifted to the change position. In theembodiment as shown in FIG. 1, the member 20 that presses the webcomprises a carriage 21, a beam 22, and a brush device 23. The carriage21 is fitted to move along the guides 25. The actuator of the brushdevice 23 is denoted with the reference numeral 24. In this embodiment,the actuator 24 is a transfer cylinder, which is fitted to displace thecarriage 21 along the guides 25.

As comes out from FIGS. 2 . . . 4, the full reel 12 is shifted to thechange position so that, during nip-free reeling, the brush device 23forms a contact with the web P, which contact prevents access of airbetween the web layers, and the brush device follows the full reel 12during its transfer to the change position. In this embodiment, when thecarriage 12 collides against the reeling carriage 15, the brush device23 can rise, and then the brush device 23 can finish the surface layersof the machine reel 13 that is being formed. The brush device 23 isattached pivotally to the frame part 21 of the brush device 23, i.e. tothe carriage 21. Of course, the beam 22 of the brush device 23 can becombined with an actuator (not shown) which is fitted to displace thebrush device 23 during the reeling of the surface layers to be finishedaway from the face of the reel 12 that is being completed along such apath of movement D that the brush device 23 maintains a contact of thedesired extent with the face of the reel 12 that is being completed.

In the embodiment shown in the figures in the drawing, a brush device 23has been used as the member 20 that presses the brush. As the member 20that presses the web, it is equally well possible to use, e.g., afragmentary roll or a spreader bar.

Above, just one preferred embodiment of the invention has beendescribed, and it is obvious to a person skilled in the art thatnumerous modifications can be made to said embodiment within the scopeof the inventive idea defined in the accompanying patent claims.

We claim:
 1. A method for finishing the surface layers of a machine reelformed during reeling of a web in a reeling station in which the reelforms a nip with a reeling drum, comprising the steps of:providing apressing member with a brush, while the reel is in nip-definingrelationship with the reeling drum in the reeling station displacing thepressing member toward the reel until the brush contacts a face of thereel and presses the web against the face of the reel, and maintainingthe brush of the pressing member in pressing contact with the face ofthe reel while the reel is out of nip-defining relationship with thereeling drum during winding of the finishing surface layers onto thereel to thereby prevent air from entering between the web and the reelas the finishing surface layers are wound onto the reel.
 2. The methodof claim 1, further comprising the step of moving at least one of thereel and reeling drum from the nip-defining position to a reel changeposition in which the reel is out of nip-defining relationship with thereeling drum.
 3. The method of claim 1, further comprising the step oftransferring the reel from the reeling station to a reel change positionin which the reel is out of nip-defining relationship with the reelingdrum, and wherein the step of maintaining the brush of the pressingmember in pressing contact with the face of the reel comprises the stepof simultaneously displacing the pressing member during the transfer ofthe reel from the reeling station to the reel change position.
 4. Themethod of claim 3, further comprising the step of during the reeling ofthe finishing surface layers when the reel is in the reel changeposition, shifting the pressing member along a path of movement tomaintain the pressing contact of a desired extent between the brush andthe face of the reel.
 5. An arrangement for finishing the surface layersof a machine reel formed during reeling of a web in a reeling station inwhich the reel forms a nip with a reeling drum and is transferred fromthe reeling station to a reel change position, comprisingpressing meansfor pressing the web against the reel, said pressing means comprising abrush, and displacement means coupled to said pressing means fordisplacing said pressing means to a position adjacent the web running ona face of the reel in which said brush is in contact with the web, saidbrush being pressed by said pressing means against the face of the reelwhile the reel is in nip-defining relationship with the reeling drum tothereby press the web against the reel and prevent access of air betweenthe web and the reel, said displacement means and said pressing meansbeing structured and arranged to maintain said brush in pressing contactwith the face of the reel while the reel is out of nip-definingrelationship with the reeling drum during winding of the finishingsurface layers onto the reel to thereby prevent air from enteringbetween the web and the reel as the finishing surface layers are woundonto the reel.
 6. The arrangement of claim 5, further comprising guidemeans for guiding displacement of said pressing means, said displacementmeans comprising actuators for shifting said pressing means along a pathof movement guided by said guide means in order to maintain contact of adesired extent between said brush and the face of the reel duringwinding of the finishing surface layers onto the reel.
 7. Thearrangement of claim 5, further comprising guide members for guidingmovement of said brush via said displacement means.
 8. The arrangementof claim 5, wherein said pressing means further comprise a frame partand pivot means for pivotally attaching said brush to said frame part.9. The arrangement of claim 5, wherein said displacement means comprisean actuator connected to said pressing means.
 10. The arrangement ofclaim 5, wherein at least one of the reel and reeling drum is moved fromthe nip-defining position to a reel change position in which the reel isout of nip-defining relationship with the reeling drum.
 11. Thearrangement of claim 5, wherein the reel is transferred from the reelingstation to a reel change position in which the reel is out ofnip-defining relationship with the reeling drum, said displacement meansbeing structured and arranged to simultaneously displace said pressingmeans during the transfer of the reel from the reeling station to thereel change position.
 12. A reeling system for reeling a web,comprisinga reeling drum, a reel spool initially in nip-definingrelationship with said reeling drum, the web being passed through thenip and wound onto the reel spool to form a machine reel around saidreel spool which is then in nip-defining relationship with said reelingdrum, transfer means for transferring the reel to a reel change positionin which the reel is removed from nip-defining relationship with saidreeling drum, pressing means for pressing the web against the reel at alocation after the nip, said pressing means comprising a brush fordirectly contacting the web, and displacement means coupled to saidpressing means for displacing said pressing means to a position adjacentthe web running on a face of the reel in which said brush is in contactwith the web, said brush being pressed by said pressing means againstthe face of the reel while the reel is in nip-defining relationship withthe reeling drum to thereby press the web against the reel and preventaccess of air between the web and the reel, said displacement means andsaid pressing means being structured and arranged to maintain said brushin pressing contact with the face of the reel while the reel is out ofnip-defining relationship with the reeling drum during winding of thefinishing surface layers onto the reel to thereby prevent air fromentering between the web and the reel as the finishing surface layersare wound onto the reel, said displacement means comprising actuatorsfor shifting said pressing means along a path of movement in order tomaintain continuous contact of a desired extent between said brush andthe face of the reel during reeling of the web onto the reel while thereel is situated in the reel change position.
 13. The system of claim12, further comprising guide members for guiding movement of said brushvia said displacement means.
 14. The system of claim 12, wherein saidbrush comprises a frame part and pivot means for pivotally attachingsaid brush to said frame part.
 15. The system of claim 12, wherein saiddisplacement means comprise an actuator connected to said pressingmeans.